Year	Percent
2000	11.92011
2001	11.96847
2002	12.29426
2003	12.62368
2004	13.08153
2005	13.55111
2006	14.03254
2007	14.52604
2008	15.03204
2009	15.55069
2010	16.08231
2011	16.62675
2012	17.18433
2013	17.75521
2014	18.33936
2015	18.93693
2016	19.54805
2017	20.17288
2018	20.26857
2019	20.36426
2020	20.45975
2021	20.55481